enumeration values used in rules can be deleted

create a enumeration for a fact-field combination create a guided decision table using this fact-field in the condition side set the value of the field to any value in the enumeration delete the value from the enumeration no warning or error is given that the value is used in a rule when opening the guided decision table, the cell value has disappeared and the cell value is now empty. when looking at the generated decision table source code, the whole line that involved the cell (column) has disappeared from the rule when part thus altering the rules patern matching logic and all this without any warning!